Shengfeng Qin

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Large-sized free-form surface design presents some challenges in practice. Especially at the conceptual design stage, sculpting physical models is still essential for surface development, because CAD models are less intuitive for designers to design and modify them. These sculpted physical models can be then scanned and converted into CAD models. However,(More)
This paper describes a new method for recognizing overtraced strokes to 2D geometric primitives, which are further interpreted as 2D line drawings. This method can support rapid grouping and fitting of overtraced polylines or conic curves based on the classified characteristics of each stroke during its preprocessing stage. The orientation and its endpoints(More)
In order to efficiently communicate with non-hearing-impaired (NHI) in particular locations in real-time, deaf people need a more intelligent and easy to use tool beyond their sign language. In this paper, we propose a new communication tool, combining British sign language with gesture-based mobile communication technology. It can quickly translate sign(More)
Purpose – The purpose of this paper is to investigate how to measure collaborative design performance and, in turn, improve the final design output during a design process, with a clear objective to develop a design performance measurement (DPM) matrix to measure design project team members’ design collaboration performances. Design/methodology/approach –(More)
This paper presents an effective method for segmenting and building three-dimensional (3D) human models with different levels of detail (LOD) from scanned human data. Firstly, the scanned human body is decomposed into different parts according to the topological structure of human bodies. Then a simplification algorithm is developed to generate LOD human(More)
This research explored a new direction of improving collaborative design by performance measurement. More specifically, a novel 3-dimensional performance measurement model is developed and the purpose of this model is to help project managers improve team collaboration by indicating strengths and weaknesses of team members during the project development(More)
This paper presents a novel method for interpreting overtraced strokes to single line drawing. The approach consists of three stages: preprocessing, stroke classification, strokes grouping and fitting. The preprocessing methods include stroke preprocessing and grouping preprocessing. The former discuss the polygonal approximation to represents the stroke(More)